Tensions have been unusually high between NATO allies over the past week, despite coming together in Paris to commemorate the 100th anniversary of the conclusion of World War I. President Trump, who has been playing defense domestically over not attending a wreath laying ceremony for American soldiers that died during the first World War, found himself politically isolated among his national leader peers.

That isolation was, in part, intentional on the Trump administration’s part. As many national and regional leaders met at the home of French President Emmanuel Macron before heading to the Arc de Triomphe for the ceremony together, Trump was noticeably absent. He chose to arrive separately and alone, citing security protocols for the decision.

Those who are familiar with White House security precautions may recognize those protocols as a commonplace practice dictated by the Secret Service, rather than by the president himself — but Trump wasn’t the only leader that chose to arrive separately. The only other world leader to show up at the ceremony alone was Russian president Vladimir Putin; creating an unfortunate parallel for the American president that has seen his administration marred by accusations of inappropriate ties with the Kremlin dating back to the 2016 presidential election.

Things only went downhill for Trump from there, with Macron seemingly targeting Trump (and his rhetoric) in his prepared remarks. Macron seemed to take specific issue with Trump’s recent decision to embrace the moniker “nationalist” as well as his “America first” foreign policy.